Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/44052
Título: | Light distortion and spherical aberration for the accommodating and nonaccommodating eye |
Autor(es): | Araújo, Rute Juliana Ferreira Macedo Neves, Helena Isabel Ferreira Rico-del-Viejo, L. Matos, Sofia Cláudia Peixoto González-Méijome, José Manuel |
Palavras-chave: | Light distortion Glare Haloes Pupil size Spherical aberration |
Data: | Jul-2016 |
Editora: | Society of Photo Optical Instrumentation Engineers |
Revista: | Journal of Biomedical Optics |
Citação: | Macedo-de-Araújo, Rute; Ferreira-Neves, Helena; Rico-del-Viejo, Laura; Peixoto-de-Matos, Sofia C; González-Méijome, José Manuel. Light distortion and spherical aberration for the accommodating and nonaccommodating eye, Journal of Biomedical Optics, 21, 7, 075003-075003, 2016. |
Resumo(s): | To evaluate how different amounts of induced spherical aberration (SA) affect the light distortion (LD) phenomena, tests were performed using an experimental device to measure the distortion (haloes, glare, and so on) of a point source. To simulate the effect of SA, eight different phase plates between þ0.300 and −0.300 μm of SA for a 5-mm aperture were used in a random and double-masked experimental design. Measurements were performed at a distance of 2 m in a darkened room in 10 eyes of five subjects with a mean age of 26.4 6.1 years and a mean refractive error of −0.50 0.70 D. Data were obtained with natural pupil and after pupil dilatation. The measurements with this experimental system showed a significant increase in all distortion parameters with cycloplegia for the phase plates with the higher positive SA (þ0.300 and þ0.150 μm). The disturbance index increased from 14.86 6.12% to 57.98 36.20% (p < 0.05) with the þ0.300 μm plate. The same effect was observed through at a much lower rate when the eye could accommodate. Plates inducing negative SA did not change the LD compared to the control condition without induction of SA or even decreased the effect of distortion. Pupillary dilation and cyclopegia led to a significant increase in the size of the LD when increasing values of SA were induced. Accommodation and pupillary constriction are capable of compensating the degradation of the optical quality induced. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44052 |
DOI: | 10.1117/1.JBO.21.7.075003 |
ISSN: | 1083-3668 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - OCV - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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5.5.125. MACEDO-DE-ARAUJO_16_JBO (LDA and SA).pdf | 1,32 MB | Adobe PDF | Ver/Abrir |